ramp: v./n. a : to stand or advance menacingly with forelegs or with arms raised b : to move or act furiously
rampage: v./n. to rush wildly about / a course of violent, riotous, or reckless action or behavior
rampant: adj. 1 a : rearing upon the hind legs with forelegs extended b : standing on one hind foot with one foreleg raised above the other and the head in profile -- used of a heraldic animal[rampant illustration] 2 a : marked by a menacing wildness, extravagance, or absence of restraint < ~ rumors> b : profusely widespread < ~ weeds>
rampart: n. 1 : a protective barrier 2 : a broad embankment raised as a fortification and usually surmounted by a parapet 3 : a wall-like ridge (as of rock fragments, earth, or debris)
(explanation excerpted from www.m-w.com)